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am335x usb0做host用,usb接口不能识别

Other Parts Discussed in Thread: AM3354

有个项目上用的am3354这款cpu,usb0和usb1都用作了host用,ID引脚均直接接地,usb0的vbus直接接5v,drvvbus引脚用作了gpio,usb1的vbus是用drvvbus引脚控制的,但是现在系统启动后,usb1可以识别,usb0不能识别,这可能是什么原因呢?